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authorlizi00164331 <li.zi30@zte.com.cn>2017-08-07 11:39:39 +0800
committerlizi00164331 <li.zi30@zte.com.cn>2017-08-07 11:39:39 +0800
commit21d72c4a80fe2937d0c4ddd20624b27adbcd989b (patch)
treee5013ee12f74f8452e01cbff16e7b0158bc456cb /common/src/main/webapp/usageguide/appserver/node_modules/mongoose/examples/mapreduce/mapreduce.js
parentf533e73e2ae32e010b16abdcf7985abaf31ab843 (diff)
Upload the ESR GUI seed code
Issue-ID: AAI-68 Change-Id: Ia50ce0570c2fabecd77199d4e8454f56fe587c4e Signed-off-by: lizi00164331 <li.zi30@zte.com.cn>
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+// import async to make control flow simplier
+var async = require('async');
+
+// import the rest of the normal stuff
+var mongoose = require('../../lib');
+
+require('./person.js')();
+
+var Person = mongoose.model('Person');
+
+// define some dummy data
+var data = [
+ {
+ name: 'bill',
+ age: 25,
+ birthday: new Date().setFullYear((new Date().getFullYear() - 25)),
+ gender: 'Male'
+ },
+ {
+ name: 'mary',
+ age: 30,
+ birthday: new Date().setFullYear((new Date().getFullYear() - 30)),
+ gender: 'Female'
+ },
+ {
+ name: 'bob',
+ age: 21,
+ birthday: new Date().setFullYear((new Date().getFullYear() - 21)),
+ gender: 'Male'
+ },
+ {
+ name: 'lilly',
+ age: 26,
+ birthday: new Date().setFullYear((new Date().getFullYear() - 26)),
+ gender: 'Female'
+ },
+ {
+ name: 'alucard',
+ age: 1000,
+ birthday: new Date().setFullYear((new Date().getFullYear() - 1000)),
+ gender: 'Male'
+ }
+];
+
+
+mongoose.connect('mongodb://localhost/persons', function(err) {
+ if (err) throw err;
+
+ // create all of the dummy people
+ async.each(data, function(item, cb) {
+ Person.create(item, cb);
+ }, function(err) {
+ if (err) {
+ // handle error
+ }
+
+ // alright, simple map reduce example. We will find the total ages of each
+ // gender
+
+ // create the options object
+ var o = {};
+
+ o.map = function() {
+ // in this function, 'this' refers to the current document being
+ // processed. Return the (gender, age) tuple using
+ /* global emit */
+ emit(this.gender, this.age);
+ };
+
+ // the reduce function receives the array of ages that are grouped by the
+ // id, which in this case is the gender
+ o.reduce = function(id, ages) {
+ return Array.sum(ages);
+ };
+
+ // other options that can be specified
+
+ // o.query = { age : { $lt : 1000 }}; // the query object
+ // o.limit = 3; // max number of documents
+ // o.keeptemp = true; // default is false, specifies whether to keep temp data
+ // o.finalize = someFunc; // function called after reduce
+ // o.scope = {}; // the scope variable exposed to map/reduce/finalize
+ // o.jsMode = true; // default is false, force execution to stay in JS
+ o.verbose = true; // default is false, provide stats on the job
+ // o.out = {}; // objects to specify where output goes, by default is
+ // returned, but can also be stored in a new collection
+ // see: http://mongoosejs.com/docs/api.html#model_Model.mapReduce
+ Person.mapReduce(o, function(err, results, stats) {
+ console.log('map reduce took %d ms', stats.processtime);
+ console.log(results);
+ cleanup();
+ });
+ });
+});
+
+function cleanup() {
+ Person.remove(function() {
+ mongoose.disconnect();
+ });
+}